In Jainism, dietary guidelines are rooted in the principle of ahimsa (non-violence) and minimizing harm to even the smallest forms of life. Regarding moth dal (matki or moth beans):

• Moth dal is generally considered acceptable for consumption by Jains only if it is old (aged) and completely dry, as fresh pulses and beans are believed to contain more life-forms (anantkayis), which goes against the principle of non-violence.
• Most orthodox Jains avoid fresh pulses, beans, and sprouts because they are considered to have many living beings within them.
• Flours made from old, dried pulses (such as dried chickpeas, urad dal, or moong dal) are usually acceptable, provided they are not freshly sprouted or green.

Pulses and flours commonly avoided by Jains:

• Fresh pulses, fresh beans, and freshly sprouted grains.
• Green gram (moong), chickpeas (chana), and other pulses should not be consumed in their fresh, green, or sprouted form.
• Some very strict Jain sects avoid certain underground root vegetables (like potatoes, onions, and garlic), but this is separate from pulses.

Summary: You may eat moth dal if it is old, dry, and not sprouted. Avoid fresh, green, or sprouted pulses and beans. Flours made from dried pulses are generally acceptable.

If you follow stricter Jain dietary codes (such as those observed during Paryushan or by monks), consult a Jain monk or a community elder for more specific guidance.